SECURITIES (Held to maturity securities) (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	$ 839,623	$ 838,241
Gross Unrealized Gains	9,913	3,622
Gross Unrealized Losses	(5,240)	(25,464)
Estimated Fair Value	844,296	816,399
Obligations of states and political subdivisions
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	839,623	838,241
Gross Unrealized Gains	9,913	3,622
Gross Unrealized Losses	(5,240)	(25,464)
Estimated Fair Value	$ 844,296	$ 816,399